I wasn't too bad on this until they had the homing torpedoes. Hey it looked great in "Hunt for Red October", but.........the technology didn't exist. Movie makers always go wrong when they play the audience for suckers.
As a departure, when I saw "Gladiator" I thought the motivation of the one officer who refused his sword to Commodus at the end to be very odd; not supported by what had gone before. I now have the deluxe DVD set and his motivation for basically betraying the emperor was brought forth in a deleted scene. So movie makers have to cross a lot of "T"s and dot a lot of "i"s t make things work.
Walt
You should do some research. The US Navy fielded the Mark 27 passive acoustic homing torpedo in 1943; however it was only used by Pacific theatre submarines. The Kriegsmarine also developed them for u-boat use. HERE are pictures of the Mark 27. Cute little thing, no?
AB